초록 ▼

An impeller for a centrifugal pump is disclosed for attenuating the effects of pressure and flow surges experienced by the pump. The impeller includes a rotatable impeller shaft to which a plurality of circumferentially-spaced vanes are mounted for rotation therewith, the vanes extending outwardly r

An impeller for a centrifugal pump is disclosed for attenuating the effects of pressure and flow surges experienced by the pump. The impeller includes a rotatable impeller shaft to which a plurality of circumferentially-spaced vanes are mounted for rotation therewith, the vanes extending outwardly relative to the impeller shaft and each including first and second axially spaced edges. First and second axially-spaced cover members are provided for the plurality of vanes, the cover members being mounted for rotation with the impeller shaft and extending outwardly relative to the axial direction of the impeller shaft. The first cover member is disposed adjacent to first edges of the vane and the second cover member is disposed adjacent to second edges of the vane so as to provide an impeller chamber between the first and second cover members which is divided into subchambers by the vanes. One of the cover members includes a centrally disposed opening therethrough for admitting into the impeller chamber to then be conducted outwardly upon rotation of the impeller shaft. Also, the first cover member is constructed and mounted relative to the vanes so that a portion thereof is free to flex axially away from respective portions of the first edges of the vanes in response to fluid pressure pulsations within the impeller chamber to temporarily increase the distance between the portion of the first cover member and the respective portions of the first edges of the vanes.

대표청구항 ▼

An impeller for a centrifugal pump comprising: a rotatable impeller shaft; a plurality of circumferentially spaced vanes mounted for rotation with said impeller shaft, said vanes extending outwardly relative to said impeller shaft and each including first and second axially-spaced edges; first and s

An impeller for a centrifugal pump comprising: a rotatable impeller shaft; a plurality of circumferentially spaced vanes mounted for rotation with said impeller shaft, said vanes extending outwardly relative to said impeller shaft and each including first and second axially-spaced edges; first and second axially-spaced cover members for said plurality of vanes, said cover members being mounted for rotation with said impeller shaft and extending outwardly relative to the axial direction of said impeller shaft, said first cover member being disposed adjacent to said first edges of said vanes and said second cover member being disposed adjacent to said second edges of said vanes so as to provide an impeller chamber between said first and second cover members which is divided into subchambers by said vanes; one of said first and second cover members having a centrally disposed inlet opening therethrough for admitting fluid into said impeller chamber to then be conducted outwardly upon rotation of said impeller shaft; and said first cover member being so constructed and mounted relative to said vanes that a portion thereof is free to flex axially away from respective portions of said first edges of said vanes in response to fluid pressure pulsations within said impeller chamber to temporarily increase the distance between said portion of said first cover and said respective portions of said first edges of said vanes.